Charge Hydraulic System - Toro Sand Pro 5040 Service Manual

Charge Hydraulic System

NOTE: When initially starting the hydraulic system with
new or rebuilt components such as motors, pumps or lift
cylinders, it is important that the hydraulic system be
charged properly. Air must be purged from the system
and its components to reduce the chance of damage.
IMPORTANT: Change hydraulic oil filter whenever
hydraulic components are repaired or replaced.
1. Position machine on a level surface with the engine
off.
2. Make sure all hydraulic connections, lines and com-
ponents are secured tightly.
3. If component failure was severe or if the hydraulic
system is contaminated, flush and refill hydraulic sys-
tem and tank (see Flush Hydraulic System).
4. Make sure hydraulic tank is full. Add correct oil if nec-
essary (see Operator's Manual).
5. Check traction rod to the hydrostat for proper adjust-
ment, binding or broken parts.
6. Disconnect and ground engine spark plug wires to
prevent the engine from starting.
7. Make sure traction pedal and the lift control lever are
in the neutral position. Turn ignition key switch to
START; engage starter for ten (10) seconds to prime
the traction and charge pumps. Repeat this step again.
8. Connect spark plug wires to spark plugs.
WARNING
Before jacking up the machine, review and follow
Jacking Instructions in Chapter 1 – Safety.
9. Raise front wheel and one rear wheel off the ground
and place support blocks under the frame. Chock re-
maining rear wheel to prevent movement of the ma-
chine.
CAUTION
Front wheel and one rear wheel will be off the
ground. Make sure machine is supported so it
will not move and accidentally fall to prevent in-
juring anyone under machine.
Hydraulic System
10.Make sure traction pedal and lift control lever are in
neutral. Start engine and run at low idle speed (1750
RPM). The charge pump should pick up oil and fill the
hydraulic system. If there is no indication of fill in 30 se-
conds, stop the engine and determine the cause.
11. After the hydraulic system starts to show signs of fill,
actuate lift control lever until the lift cylinder moves in
and out several times. If the cylinder does not move after
10 to 15 seconds or if the pump emits abnormal sounds,
shut the engine off immediately and determine cause or
problem. Inspect for the following:
A. Loose filter or suction lines.
B. Incorrect hydraulic hose routing.
C. Blocked suction line.
D. Faulty charge relief valve in hydrostat.
E. Faulty charge pump (gear pump P1).
12.If lift cylinder moves in 10 to 15 seconds, proceed to
step 13.
13.Operate the traction pedal in the forward and reverse
directions. The wheels off the ground should rotate in
the proper direction.
A. If the wheels rotate in the wrong direction, stop
engine, remove lines from top of hydrostat pump and
reverse the connections.
B. If the wheels rotate in the proper direction, stop
engine.
14.Adjust traction pedal to the neutral position (see Op-
erator's Manual).
15.Check and adjust traction neutral switch (see Opera-
tors Manual).
16.Lower machine to ground. Remove chock from rear
wheel.
17.If the traction pump or a wheel motor was replaced
or rebuilt, run the traction unit so all wheels turn slowly
for 10 minutes.
18.Operate machine by gradually increasing its work
load to full over a 10 minute period.
19.Stop the machine. Check hydraulic oil level and ad-
just if necessary. Check hydraulic components for leaks.
Tighten any loose connections.
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Sand Pro & Infield Pro 3040/5040